So my wrestling coach tells me to wrestle this skinny shorter white guy. I'm pretty confident and smile because I know the arm drag and he doesn't. So I try the arm drag on him and it fails! For some goddamn reason my left hand can't get his leg(I like to do single-leg takedowns with the arm drag). Lost the first period. Second round, we spend 2 minutes with me going after arm-drag after arm-drag. I put him on the defensive but I ended up on my back.

What should I do if the arm-drag fails?

I want to learn how to eventually set-up a takedown with the arm-drag. So if arm-drag fails, something else happens and he loses.